Prerequisites
This page is only available when a TP90 transceiver is installed on your TV80 system. The TP90 Diagnostics plots only show data when there is at least one PxPos sensor configured in the TV80 software and listed in the Sensor List.
Context
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The first graph shows the received signal and the pulse detection threshold as a function of time. The orange marker identifies the pulse the transceiver has determined to be the sensor's reply pulse. The reply pulse is the pulse used to calculate range and bearing to the sensor. The green markers show which pulses the receiver has determined to be the consecutive measurement pulses sent by the sensor.This graph can be used for:
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Checking if the transceiver can detect the sensor(s). |
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Visualising the signal to noise ratio. |
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Selecting a good value for the detection threshold setting.
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The second graph shows the measured phase difference between the two elements of the transducer. The phase difference is used to calculate the bearing to the sensor. The graph also includes some data before and after the pulse used for the phase measurement. The phase detection window is represented by the space between the two dotted orange lines. Although we do not recommend that you change this setting, certain situation may require it. To change it, modify the Phase Detection Offset parameter in the Trawl Positioning Configurator dialog box. This parameter is under the Transceiver Settings group. The orange marker shows the location of the peak of the sensor's reply pulse. This is considered the ideal position of the phase detection window.
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Procedure
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Verify that one or several hydrophones are connected to the receiver. |
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On the Setup menu, select Installation.
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Use the transducer or the transceiver icons of the TP90 block diagram on the I/O Setup group to open the Trawl Positioning Configurator dialog box. |
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Open the Transceiver page. |
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Select the Diagnostics button to open the TP90 Diagnostics dialog box. |
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Observe the graphs to inspect the quality of reception. |